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| CALIFORNIA MICRO DEVICES PAC 27A03 P/ACTIVE PRECISION VOLTAGE DIVIDER NETWORK FOR LINEAR TECHNOLOGY LT1430/1017 Features Provides a complete Pentium Pro regulator solution when combined with a Linear Technology LTC1430/LT1017 Power Supply Regulator Chip Thin film tightly ratio matched resistors using P/Active technology SOIC and QSOP Package Applications Pentium Pro Power Supply Regulator Refer to AP-202 Voltage Divider Application Note for further information. Product Description CMDs P/Active 27A03 Precision Voltage Divider Network is designed to work with the Linear Technology LTC1430 High Power Step-down Switching Regulator Controller. CMDs P/Active technology provides precision ratio tracking over temperature range required for the proper voltage regulation in Pentium Pro-based regulator designs. STANDARD SPECIFICATIONS Absolute Tolerance (R) 5% Ratio Tracking (0oC TA 70oC) (Voltage per resistor <10 volts and power per resistor <25mW) R11/R12 0.25% R1/R6 0.25% R1/R7 0.5% R1/R8 1.0% R1/R9 2.0% R1/(R2+R3+R4+R5) 0.25% (R3+R4+R5)/(R1+R2) 0.5% (R4+R5)/(R1+R2+R3) 0.5% R5/(R1+R2+R3+R4) 0.5% Operating Temperature Range 0oC to 70oC Power Rating/Resistor 25mW @ 70oC Storage Temperature -65OC to +150OC Package Power Rating 1.00W, max. STANDARD VALUES Resistor (R) Value (Ohms) R1 17600 R2 14219 R3 2381 R4 833 R5 12858 R6 27770 R7 55600 R8 111260 R9 222580 R10 1000 R11 33000 R12 33000 R13 47000 R14 47000 R15 47000 (c) 1993, 1996 CMD Corp. All rights reserved. 8/96 SCHEMATIC CONFIGURATION 16 6 R9 R8 R7 R6 R2 R1 R13 7 R10 5 11 10 9 13 R4 R14 15 R11 8 12 R3 4 R12 14 2 R5 R15 3 1 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 CALIFORNIA MICRO DEVICES PAC 27A03 Package Pins Style 16 SOIC Narrow 16 QSOP ORDERING INFORMATION Ordering Part Number Tubes Tape & Reel PAC27A03S/T PAC27A03S/R PAC27A03Q/T PAC27A03Q/R Part Marking PAC27A03 PAC27A03 Application Diagram LT 1017 5 SENS +SENS 7 VTRIM 6 LT 1430 + + POWER GOOD +5V PAC 27A03 1 2 3 4 5 16 15 14 13 12 11 10 9 + 1.2V REFERENCE LT 1004 10.7K 5.76K Vcc SENSE 680pF VOLTAGE SELECTS MSB 10 6 7 8 TO OVER VOLTAGE CIRCUITRY LSB 74AC125 LT 1430/LT 1017 (c)1993, 1996 CMD Corp. All rights reserved. 215 Topaz Street, Milpitas, California 95035 Tel: (408) 263-3214 Fax: (408) 263-7846 8/96 |
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